All integral types may be converted to float-point type variable.
using System;
class Program
{
static void Main(string[] args)
{
int i = 5;
float f = i;
Console.WriteLine(i);
Console.WriteLine(f);
}
}
The output:
5
5
When converting a large-size type to a small-size type you can use the implicit conversion.
The following code converts an int
type variable to a long
type variable.
long
type is larger than the int
type, so the conversion is implicit.
using System;
class Program
{
static void Main(string[] args)
{
int i = 5;
long l = i;
Console.WriteLine(i);
Console.WriteLine(l);
}
}
The double
type is larger than the float
type.
using System;
class Program
{
static void Main(string[] args)
{
int i = 5;
long l = i;
Console.WriteLine(i);
Console.WriteLine(l);
}
}
You have to do the explicit conversion by adding a cast during an information-may-lost conversion.
The following code convert a long
type variable to an int
type variable.
The information contained in the long
type variable may get lost during the conversion, so a cast is needed.
using System;
class Program
{
static void Main(string[] args)
{
long l = 999999999999999999L;
int i = (int)l;
Console.WriteLine(l);
Console.WriteLine(i);
}
}
The output:
999999999999999999
-1486618625
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